Steam-generator.



No. 627,52l. Patented June 27, I899.

K. PARK.

STEAM GENERATOR.

(Application filed Jan. 4, 1899.) (No Model.) 3 Sheets$heet I.

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STEAM GENERATOR.

(Apiflieation filed Jan. 4, 1899.} (No Model.) 3 Sheets-Sheet 2.

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No. 627,52l. Patented June 27, I899.

' K. PARK.

STEAM GENERATOR.

(Application filed Jan. 4, 1899.)

(No Model.) a sheds-sheet a.

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UNITED STATES PATENT OFFICE.

KENNEDY PARK, OF oAMenInen, MASSACHUSETTS.

STEAM-GENERATOR SPECIFICATION-forming part of Letters Patent No.627,521, dated June 27, 1899.

Application filed January 4, 1899. i

tors, of which thefollowingis a specification.

This invention relates tosteam boilers and generators of tubularconstruction, a plurahty of tubes being arranged overthe fire-' box andconnected at their ends with head-,

ers which communicate 'with' the amma Water drums.

The invention has for its object to provide a steam-generator of thistype which shall be of compact construction, the tubes being of suchlength asto enable theapparatus to be conveniently usedon steam-yachtsand other relatively small navigable vessels, the gen erator beingat thesame time constructed so as to utilize as fully as possible theefficiency of the fire.

The invention consists in the improvements which I will now proceed. todescribe and claim. 1

Of the accompanying drawings, forming a part of this specification,Figure l represents a front elevation of a steam-generator embodying myinvention, a part of the casing being removed. Fig. 2' represents asection on line 2 2 of Fig. 1. Fig. 3represents a section on line 3 3 ofFig.2.

The same letters of referen ce indicate the same parts in all thefigures. v

I have shown my invention embodied in a steam-generatorhaving twofire-boxes, each having a grate a and'a fire-door a.

12 represents thebridge-wall, which forms the rear end of each fire-box.

c c c 0 represent inclined tubes located above the fire-boxes, theforward portions of said tubes-bein g separated by spaces, through whichthe products of combustion from the fire-boxes pass upwardly to thechamber or space 01 above said tubes. A vertical wall or baffle-plate'eextends from the top of the bridge-wall across the series of tubes andto the space or chamber d, where said wall terminates, the wall forminga barrier between the space over the fire-boxes surrounding the frontportions of the tubes 0 and a corresponding, although preferablyshorter, space surrounding the rear portions of the tubes Serial No.701,113. (No model.)

and extending from the rear portion of the chamber 61 downwardly to aspace or chamber 61 below the rear portions of the tubes and behind thebridge-wall b. The front and rear ends of the tubes 0 c are inserted infront headers f and rear headers f, the headers f collectively forming afront Wall and the headers f a rear wall. The upper ends of the headersf are connected by tubes f with the steam-drum 9, while the upper endsof the headers f are connected by tubes f with said steam-drum, thetubes f entering the drum 9 at a higher level than the tubes f so thatthe steam and hotwater, which are caused by the inclination of the tubes0 c to flow upwardly into the headers f, pass from thence into thesteam-drum at or above the water-level of the latter, while the waterfrom the lower portion 'of the steam-drum flows downwardly through thetubes f into the headers f and into the lower ends of the tubes 0 c.

It represents a water-drum located below and connected with the lowerends of the 'heade1's-'f,'said drum being connected by ber d,'aninclined baffle-plate e, forming an extension of the wall 6, causing theproducts to pass into the forward portion of said chamber d, asindicated by arrows in Fig. 2. The products of combustion pass throughthe chamber at, over the baffle-plate 6, across the upper end of thewall a, and then pass downwardly between the rear portions of the tubes0 and c to the chamber 61'. The end portions of the space or chamber 61communicate with vertical fiues or uptakes 2' 4), Fig. 3, which areformed by vertical walls or partitions jj, located between the rearportions of the tubes 0 c and the end portions j of the external casing.The said flues 2' extend from the chamber d to the endsof a supplementalchamber m, formed by a casing m, located above the series of tubes atthe rear. side of the steam-drum, as shown in Fig. 2. v Theescape flueor stack 0 extends from the upper portion of the chamber m, and in saidchamber is located a feed-water heater composed of a connected series oftubes 1), having suitable connections at one end with a source ofwater-supply and at the other end with the steam-drum g. To aiford spacefor the vertical fines it, two headers f are omitted from the ends ofthe series of rear headers, and the tubes 0 c that would have enteredthe omitted headers f are connected with the vertical tubes t' which arelocated beside the tube 2', and thus take the place of the omittedheaders f.

It will be seen that the described construction causes the products ofcombustion after passing upwardly between the forward portions of thetubes 0 c to pass downwardly between the rear portions of said tubes andthen pass through the feed-water heater before escaping, the entirearrangement being such that economy of space and an economical use ofthe fuel are obtained. This generator is well adapted for use onsea-going vessels of small size, such as steam-yachts, owing to itscompact form.

It is obvious that the arrangement may be such that the products ofcombustion will pass downwardly through the flues t' 2' from the chamber01 to the chamber d and then upwardly between the rear portions of thetubes c c to the chamber m and through the feedwater heater. I do notconsider the last-mentioned arrangement, however, so desirable as thatfirst described, it being obviously more advantageous to pass theproducts of combustion directly from the chamber (1 downwardly betweenthe rear portions of the tubes 0 and c and then upwardly to thefeed-water heater.

The vertical tubes i which take the places of the omitted headers f,serve also to support the steam-drum, and as the tubes '11 extend fromthe lowest portion of the steam-drum and are connected by the tubes "6with the water-drum a flow of water from the steamdrum to the water-drumis insured so long as any water remains in the steam-drum.

The tubes 1" are connected with the steamdrum by means of flanges 2'formed 011 the tubes 1'', and bolts '6 passing through said flanges intothe steam-drum. To insure a tight joint, the sleeve or nipple i isexpanded in the orifice formed in the steam-drum to connect it with thetube 2", said orifice being smaller than the interior of said tube. Thesleeve 2' extends into the tube t" and is expanded against the innersurface of the latter, the tube being preferably provided with aninternally projecting annular seat against which the outer portion ofthe sleeve 11 is expanded. This connection may be applied to other partsof the apparatusf0r example, where the headers f join the waterdrum h.

The wall or partition e may be formed by inserting suitablyshapedsections of firebrick between the tubes 0 c c c, or said wall may behollow and formed as a water-leg, its interior communicating with thesaid tubes,

in which case the wall may be composed of a series of headers like theheadersf orf, and the tubes instead of extending continuously across thebridge-wall would each be made in two parts or sections expanded intothe headers forming the wall 6. The walls or partitions jj may also bemade by inserting sections of fire-brick between the outer vertical rowsof tubes at the rear of the wall e.

I claim- 1. A boiler or steam-generator comprising a fire-box, a seriesof tubes extending lengthwise over the fire-box and across thebridgewall of the fire-box, a partition extending across the series oftubes between their forward and rear portions and extending partly overthe forward portions of the tubes, said partition causing the productsof combustion rising directly from the fire-box to pass be- ,tween theforward portions of the tubes including their forward ends, an elevatedspace or chamber above the tubes to receive the products of combustionfrom between the forward portions of the tubes, a lower space or chamberbelow the rear portions of the tubes, an escape fine or stack, andconnections between the stack, the lower chamber, and the elevatedchamber, whereby the products of combustion received by the elevatedchamber are conducted first downwardly and then upwardly, the saidproducts being presented to the rear portions of the tubes in theirpassage from the elevated chamber to the stack.

2. A boiler or steam-generator comprising a fire-box, a series of tubesextending lengthwise over the fire-box and across the bridgewall of thefire-box, a partition extending across the series of tubes between theirforward and rear portions and extending partly over the forward portionsof the tubes, said partition causing the products of combustion risingdirectly from the fire-box to pass between the forward portions of thetubes including their forward ends, an elevated space or chamber abovethe tubes to receive the products of combustion from between the forwardportions of the tubes, a lower space or chamber below the rear portionsof the tubes, an escape flue or stack, connections between the stack,the lower chamber, and the elevated chamber, whereby the products ofcombustion received by the elevated chamber are conducted firstdownwardly and then upwardly, the said products being presented to therear portions of the tubes in their passage from the elevated chamber tothe stack, and a feed-water heater arranged to be acted on by theproducts of combustion rising from the rear portions of the tubes.

3. A boiler or steam-generator comprising a fire-box, a series of tubesextending lengthwise over the fire-box and across the bridgewall of thefire-box, a partition extending across the series of tubes between theirforward and rear portions, said partition causing the products ofcombustion rising directly from the fire-box to pass between the forwardportions of the tubes, an elevated space or chamber above the tubes toreceive the products of combustion from between the forward portions ofthe tubes, a lower space or chamber below the. rear portions of thetubes, a. supplemental casing or chamber above the rear portions of thetubes, an escape flue or stack connected with the supplemental chamber,fines or uptakes connecting the ends of the lower chamber with the endsof the supplemental chamber, the arrangement being such that theproducts of combustion pass 1,

